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android - 如何在 Android 中使用 Yahoo API 获取 7 天的天气预报?

转载 作者:行者123 更新时间:2023-11-29 00:24:24 24 4
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我为 7 天的天气预报制作了一个示例 Android 应用程序,我使用以下链接制作:

weather forecast

我知道 Yahoo weather api“w”和“u”中有两个参数,但我不知道如何通过更改这些参数来获得 7 天的天气预报。请告诉我应该做哪些更改才能获得 7 天的天气预报而不是 5 天。我的代码如下:

myxml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >

<TextView
android:id="@+id/weatherLink"
android:layout_width="fill_parent"
android:layout_height="40dp"
android:background="#cecece"
android:gravity="center_vertical|center_horizontal"
android:text="Weather Link"
android:textColor="#ffffff"
android:textSize="22sp"
android:textStyle="bold" />

<TextView
android:id="@+id/weather_title"
android:layout_width="fill_parent"
android:layout_height="40dp"
android:background="#cecece"
android:gravity="center_vertical|center_horizontal"
android:text="Weather"
android:textColor="#ffffff"
android:textSize="22sp"
android:textStyle="bold" />

<ImageView
android:id="@+id/weather_border"
android:layout_width="fill_parent"
android:layout_height="2dp"
android:layout_below="@+id/weather_title"
android:layout_marginBottom="10dp"
android:background="#CCCCCC" />

<ScrollView
android:id="@+id/scrollView1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_above="@+id/footer_border"
android:layout_below="@+id/weather_border" >

<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content" >

<TextView
android:id="@+id/dateText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignTop="@+id/icon"
android:layout_toRightOf="@+id/icon"
android:textColor="#333333"
android:textSize="16sp" />

<TextView
android:id="@+id/tempText"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/dateText"
android:layout_toRightOf="@+id/icon"
android:textColor="#333333"
android:textSize="16sp" />

<TextView
android:id="@+id/conditionText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_below="@+id/tempText"
android:layout_toRightOf="@+id/icon"
android:textColor="#333333"
android:textSize="16sp" />

<TextView
android:id="@+id/humidityText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_below="@+id/conditionText"
android:layout_toRightOf="@+id/icon"
android:textColor="#333333"
android:textSize="16sp" />

<TextView
android:id="@+id/windText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_below="@+id/humidityText"
android:layout_marginBottom="10dp"
android:layout_toRightOf="@+id/icon"
android:paddingBottom="10dp"
android:textColor="#333333"
android:textSize="16sp" />

<ImageView
android:id="@+id/border2"
android:layout_width="fill_parent"
android:layout_height="2dp"
android:layout_below="@+id/windText"
android:background="#ff6600" />

<TextView
android:id="@+id/forecast_title"
android:layout_width="fill_parent"
android:layout_height="40dp"
android:layout_below="@+id/border2"
android:background="#bebebe"
android:gravity="center_vertical|center_horizontal"
android:text="Forecast"
android:textColor="#333333"
android:textSize="18sp"
android:textStyle="bold" />

<ImageView
android:id="@+id/forecastBorder"
android:layout_width="fill_parent"
android:layout_height="1dp"
android:layout_below="@+id/forecast_title"
android:background="#CCCCCC" />

<TextView
android:id="@+id/day1"
android:layout_width="wrap_content"
android:layout_height="40dp"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_below="@+id/forecastBorder"
android:background="#cecece"
android:gravity="left|center_vertical"
android:paddingLeft="10dp"
android:textAlignment="gravity"
android:textColor="#333333"
android:textSize="16sp" />

<TextView
android:id="@+id/day2"
android:layout_width="wrap_content"
android:layout_height="40dp"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_below="@+id/day1"
android:background="#cecece"
android:gravity="left|center_vertical"
android:paddingLeft="10dp"
android:textAlignment="gravity"
android:textColor="#333333"
android:textSize="16sp" />

<TextView
android:id="@+id/day3"
android:layout_width="wrap_content"
android:layout_height="40dp"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_below="@+id/day2"
android:background="#bebebe"
android:gravity="left|center_vertical"
android:paddingLeft="10dp"
android:textAlignment="gravity"
android:textColor="#333333"
android:textSize="16sp" />

<TextView
android:id="@+id/day4"
android:layout_width="wrap_content"
android:layout_height="40dp"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_below="@+id/day3"
android:background="#bebebe"
android:gravity="left|center_vertical"
android:paddingLeft="10dp"
android:textAlignment="gravity"
android:textColor="#333333"
android:textSize="16sp" />

<TextView
android:id="@+id/day5"
android:layout_width="wrap_content"
android:layout_height="40dp"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_below="@+id/day4"
android:background="#bebebe"
android:gravity="left|center_vertical"
android:paddingLeft="10dp"
android:textAlignment="gravity"
android:textColor="#333333"
android:textSize="16sp" />

<TextView
android:id="@+id/day6"
android:layout_width="wrap_content"
android:layout_height="40dp"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_below="@+id/day5"
android:background="#bebebe"
android:gravity="left|center_vertical"
android:paddingLeft="10dp"
android:textAlignment="gravity"
android:textColor="#333333"
android:textSize="16sp" />

<TextView
android:id="@+id/day7"
android:layout_width="wrap_content"
android:layout_height="40dp"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_below="@+id/day6"
android:background="#bebebe"
android:gravity="left|center_vertical"
android:paddingLeft="10dp"
android:textAlignment="gravity"
android:textColor="#333333"
android:textSize="16sp" />

<ImageView
android:id="@+id/icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:padding="10dp" />
</RelativeLayout>
</ScrollView>

<ImageView
android:id="@+id/footer_border"
android:layout_width="fill_parent"
android:layout_height="2dp"
android:layout_above="@+id/footer"
android:background="#CCCCCC" />

<ImageView
android:id="@+id/footer"
android:layout_width="fill_parent"
android:layout_height="50dp"
android:layout_alignParentBottom="true"
android:background="#E4E4E4" />

<ImageButton
android:id="@+id/reportBtn"
android:layout_width="160dp"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_alignTop="@+id/footer"
android:background="#ffff00"
android:paddingBottom="5dp"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:paddingTop="5dp"
android:src="@drawable/ic_launcher" />

<ImageButton
android:id="@+id/backBtn"
android:layout_width="160dp"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignTop="@+id/footer"
android:background="#aaaaaa"
android:paddingBottom="5dp"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:paddingTop="5dp"
android:src="@drawable/ic_launcher" />

</RelativeLayout>

ma​​in.java

package com.example.weekreport;

import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.StringTokenizer;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.protocol.BasicHttpContext;
import org.apache.http.protocol.HttpContext;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.xml.sax.SAXException;

import android.app.Activity;
import android.app.ProgressDialog;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.os.Bundle;
import android.text.Html;
import android.view.Menu;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {
String temperature, date, condition, humidity, wind, link;
Bitmap icon = null;
TextView title, tempText, dateText, conditionText, windText, humidityText,
weatherLink, day1, day2, day3, day4, day5, day6, day7;
ImageView image;
ArrayList<String> weather = new ArrayList<String>();
ProgressDialog dialog;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
image = (ImageView) findViewById(R.id.icon);
title = (TextView) findViewById(R.id.weather_title);
dateText = (TextView) findViewById(R.id.dateText);
tempText = (TextView) findViewById(R.id.tempText);
conditionText = (TextView) findViewById(R.id.conditionText);
humidityText = (TextView) findViewById(R.id.humidityText);
windText = (TextView) findViewById(R.id.windText);
day1 = (TextView) findViewById(R.id.day1);
day2 = (TextView) findViewById(R.id.day2);
day3 = (TextView) findViewById(R.id.day3);
day4 = (TextView) findViewById(R.id.day4);
day2 = (TextView) findViewById(R.id.day5);
day3 = (TextView) findViewById(R.id.day6);
day4 = (TextView) findViewById(R.id.day7);
weatherLink = (TextView) findViewById(R.id.weatherLink);
/*
* Typeface tf = Typeface.createFromAsset(getAssets(),
* “Fonts/Roboto-Condensed.ttf”);
*/
title.setText("My Weather Report");
/*
* tempText.setTypeface(tf); conditionText.setTypeface(tf);
* dateText.setTypeface(tf); humidityText.setTypeface(tf);
* windText.setTypeface(tf); title.setTypeface(tf);
* day1.setTypeface(tf); day2.setTypeface(tf); day3.setTypeface(tf);
* day4.setTypeface(tf);
*/
ImageButton backBtn = (ImageButton) findViewById(R.id.backBtn);
ImageButton report = (ImageButton) findViewById(R.id.reportBtn);

new retrieve_weatherTask().execute();
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

protected class retrieve_weatherTask extends
AsyncTask<Void, String, String> {

@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();

dialog = new ProgressDialog(MainActivity.this);
dialog.setTitle("Please wait...");
dialog.show();
}

@Override
protected String doInBackground(Void... params) {

// TODO Auto-generated method stub
String qResult = "";
HttpClient httpClient = new DefaultHttpClient();
HttpContext localContext = new BasicHttpContext();
HttpGet httpGet = new HttpGet(
"http://weather.yahooapis.com/forecastrss?w=2295425&u=c&#8221");

try {
HttpResponse response = httpClient.execute(httpGet,
localContext);
HttpEntity entity = response.getEntity();

if (entity != null) {
InputStream inputStream = entity.getContent();
Reader in = new InputStreamReader(inputStream);
BufferedReader bufferedreader = new BufferedReader(in);
StringBuilder stringBuilder = new StringBuilder();
String stringReadLine = null;
while ((stringReadLine = bufferedreader.readLine()) != null) {
stringBuilder.append(stringReadLine + "\n");
}
qResult = stringBuilder.toString();
}

} catch (ClientProtocolException e) {
e.printStackTrace();
Toast.makeText(MainActivity.this, e.toString(),
Toast.LENGTH_LONG).show();
} catch (IOException e) {
e.printStackTrace();
Toast.makeText(MainActivity.this, e.toString(),
Toast.LENGTH_LONG).show();
}

Document dest = null;
DocumentBuilderFactory dbFactory = DocumentBuilderFactory
.newInstance();
DocumentBuilder parser;
try {
parser = dbFactory.newDocumentBuilder();
dest = parser
.parse(new ByteArrayInputStream(qResult.getBytes()));
} catch (ParserConfigurationException e1) {
e1.printStackTrace();
Toast.makeText(MainActivity.this, e1.toString(),
Toast.LENGTH_LONG).show();
} catch (SAXException e) {
e.printStackTrace();
Toast.makeText(MainActivity.this, e.toString(),
Toast.LENGTH_LONG).show();
} catch (IOException e) {
e.printStackTrace();
Toast.makeText(MainActivity.this, e.toString(),
Toast.LENGTH_LONG).show();
}

Node temperatureNode = dest.getElementsByTagName(
"yweather:condition").item(0);
temperature = temperatureNode.getAttributes().getNamedItem("temp")
.getNodeValue().toString();
Node tempUnitNode = dest.getElementsByTagName("yweather:units")
.item(0);
temperature = temperature
+ "°"
+ tempUnitNode.getAttributes().getNamedItem("temperature")
.getNodeValue().toString();

Node dateNode = dest.getElementsByTagName("yweather:forecast")
.item(0);
date = dateNode.getAttributes().getNamedItem("date").getNodeValue()
.toString();

Node conditionNode = dest
.getElementsByTagName("yweather:condition").item(0);
condition = conditionNode.getAttributes().getNamedItem("text")
.getNodeValue().toString();

Node humidityNode = dest
.getElementsByTagName("yweather:atmosphere").item(0);
humidity = humidityNode.getAttributes().getNamedItem("humidity")
.getNodeValue().toString();
humidity = humidity + "%";

Node windNode = dest.getElementsByTagName("yweather:wind").item(0);
wind = windNode.getAttributes().getNamedItem("speed")
.getNodeValue().toString();
Node windUnitNode = dest.getElementsByTagName("yweather:units")
.item(0);
wind = wind
+ " "
+ windUnitNode.getAttributes().getNamedItem("speed")
.getNodeValue().toString();

String desc = dest.getElementsByTagName("item").item(0)
.getChildNodes().item(13).getTextContent().toString();
StringTokenizer str = new StringTokenizer(desc, "<=>");
System.out.println("Tokens: " + str.nextToken("=>"));
String src = str.nextToken();
System.out.println("src: " + src);
String url1 = src.substring(1, src.length() - 2);
Pattern TAG_REGEX = Pattern.compile("(.+?)<br />");
Matcher matcher = TAG_REGEX.matcher(desc);
while (matcher.find()) {
weather.add(matcher.group(1));
}

Pattern links = Pattern.compile("(.+?)<BR/>");
matcher = links.matcher(desc);
while (matcher.find()) {
System.out.println("Match Links: " + (matcher.group(1)));
link = matcher.group(1);
}

/*
* String test = (Html.fromHtml(desc)).toString();
* System.out.println(“test: “+ test); StringTokenizer tkn = new
* StringTokenizer(test); for(int i=0; i < tkn.countTokens(); i++){
* System.out.println(“Remaining: “+tkn.nextToken()); }
*/

InputStream in = null;
try {
// in = OpenHttpConnection(url1);
int response = -1;
URL url = new URL(url1);
URLConnection conn = url.openConnection();

if (!(conn instanceof HttpURLConnection))
throw new IOException("Not an HTTP connection");
HttpURLConnection httpConn = (HttpURLConnection) conn;
httpConn.setAllowUserInteraction(false);
httpConn.setInstanceFollowRedirects(true);
httpConn.setRequestMethod("GET");
httpConn.connect();

response = httpConn.getResponseCode();
if (response == HttpURLConnection.HTTP_OK) {
System.out.println("*********************");
in = httpConn.getInputStream();
}
icon = BitmapFactory.decodeStream(in);
in.close();
} catch (IOException e1) {
e1.printStackTrace();
}
return qResult;

}

protected void onPostExecute(String result) {
System.out.println("POST EXECUTE");

if (dialog.isShowing() && dialog != null)
dialog.dismiss();
tempText.setText("Temperature:" + temperature);
conditionText.setText("Condition: " + condition);
dateText.setText("Date: " + date);
humidityText.setText("Humidity: " + humidity);
windText.setText("Wind: " + wind);
image.setImageBitmap(icon);
day1.setText(weather.get(3));
day2.setText(weather.get(4));
day3.setText(weather.get(5));
day4.setText(weather.get(6));
day5.setText(weather.get(1));
day6.setText(weather.get(2));

weatherLink.setText(Html.fromHtml(link));

}

}

}

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